Novel fluorocarbon diamides

ABSTRACT

Novel fluorocarbon diamides useful as oil- and water- repellent agents have the formula WHEREIN R is a covalent bond, an alkyl diradical of one to 12 carbon atoms, an alkylene diradical of two to 12 carbon atoms, a phenyl diradical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula ; Q IS AN INTEGER FROM 1 TO 6; AND Rf is a radical having the formula

United States Patent Beyleveld et al.

[54] NOVEL FLUOROCARBON DIANIIDES [72] Inventors: Wilhelmus M. Beyleveld, Whippany; Bryce C. Oxenrider, Florham Park; Cyril Woolf, Morristown, all of NJ.

[73] Assignee: Allied Chemical Corporation, New

York, NY.

22 Filed: Oct. 17, 1969 21 Appl. No.: 867,373

[52] US. Cl ..260/404.5, 260/518 .A, 260/558 D, 260/558 R, 260/561 K, 260/561 R, 260/562 B, 106/2 [51] Int. Cl 103/30 [58] Field ofSearch ..260/561 K,518 A,

260/558 D, 558 P, 558 R, 561 R, 562 B y [56] References Cited UNITED STATES PATENTS 3,141,758 7/1964 Hamm et a1. ..260/561 HL 3,555,056 1/1971 Crescentini et al.....260/404.5

Primary ExaminerLewis Gotts Assistant ExaminerEthel G. Love Att0rneyArthur J. Plantamura and Stanley M.

Teigland 571 ABSTRACT Novel fluorocarbon diamides useful as oiland waterrepellent agents have the formula 0002 51 Oct. 10, 1972 wherein R is a covalent bond, an alkyl diradical of one to 12 carbon atoms, an a1ky1ene diradical of two to 12 carbon atoms, a phenyl diradical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula Q COOH q is an integer from 1 to 6;,and R, is a radical having the formula Q FM QF wherein s is an integer from 1 to 16, t is an integer not greater than s from 0 to 8, with the sum of s plus it being from 1 to 20; and Y is selected from the group consisting of F C- and radicals having the formula not morethan three of the R1 and R2 groups being perfluoroalkyl groups.

10 Claims, No Drawings NOVEL FLUOROCARBON DIAMIDES BACKGROUND OF THE INVENTION This invention relates to novel fluorocarbon derivatives useful as oiland water-repellent agents.

Compounds having the formula wherein i. R and R are fluorine or fluoroalkyl groups, or, when taken together, are fluoroalkylene groups forming a cycloaliphatic structure, the R and R groups each having from one to nine carbon atoms, with not more than three of the R, and R groups being fluoroalkyl groups,

ii. m and n are each integers of from O to 20, with the proviso that the sum of m plus n is from to 20, and provided further that when r is 0, m is at least 1 1 iii. X is selected from the group consisting of hydrogen and fluorine, with the proviso that when n is greater than 0, then X is always hydrogen,

iv. p is 0 or 1,

v. r is 0 or 1, with the proviso that when the sum of m,

n and p is greater than 0, then r is always 0, and

vi. q is an integer from 1 to 6 are disclosed in U.S. Pat. No. 3,576,019. The compounds are described in said patent as being useful to impart oil repellency to textile materials. Said patent further recites that the compounds are applied to the material to be rendered oil repellent by treating the material with a solution of the compound and evaporating the solvent. The treated material is then normally cured or heat-set at elevated temperatures.

An improved method of imparting oil repellency to textilematerials is disclosed in U.S. Pat. No. 3,646,153. That patent discloses compositions of synthetic resins having incorporated therein an additive which imparts oiland water-repellency directly to fibers extruded from the composition. The additives which are suitable for use in the invention of U.S. Pat. No. 3,646,153 must meet certain stringent requirements in addition to being capable of imparting oil and water repellency to the extruded fiber. The additives must be thermally stable and nonfugitive at the temperature at which the fibers are extruded. A further requirement is that the additive must be dispersible in the resin to which it is added. In developing the invention of U.S. Pat. No. 3,646,153, it was found that the compounds of U.S. Pat. No. 3,576,019 generally do not meet these requirements and hence are not suitable for use in the invention ofU.S. Pat. No. 3,646,153.

It is an object of this invention to provide derivatives of the compounds of U.S. Pat. No. 3,576,019 suitable for use in the invention of U.S. Pat. No. 3,646,153. It is a further object of this invention to provide such derivatives which are suitable for use as conventional oil-repellent agents.

SUMMARY OF THE INVENTION This invention provides a class of novel fluorocarbon compounds having the formula wherein R is a covalent bond, an alkyl diradical of one to 12 carbon atoms, an alkylene diradical of two to 12 carbon atoms, a phenyl diradical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula H000 COOH q is an integer from 1 to 6; and R, is a radical having the formula wherein s is an integer from 1 to 16, t is an integer not greater than s from 0 to 8, with the sum of s plus I being from 1 to 20; and Y is selected from the group consisting of F C and radicals having the formula wherein R and R are fluorine or perfluoroakyl groups having from one to nine carbon atoms, provided that not more than three of the R and R groups are perfluoroalkyl groups. R and R together can form a cycloaliphatic structure. I

As oil-repellent agents, the compounds of this invention have certain advantages over oil-repellent agents known to the art and, in particular, over the triazaalkane compounds from which the compounds of this invention are derived. Having over twice the molecular weight of the triazaalkane compounds, the compounds of this invention are less volatile and in general are otherwise more thermally stable than the corresponding triaza compounds. More importantly, however, the

' compounds of this invention are characterized in havsystem. The nonfluoroalkyl portion of the molecule of the compounds of this invention, which forms the I nucleus of the molecule, serves to orient the molecule in the substrate while leaving the four fluoroalkyl tails free to extend from the surface of the substrate and perform their function of repellency. This feature of the compounds of this invention makes them especially valuable as additives which can be incorporated directly into a synthetic resin, which can then be extruded as a fiber having oiland water-repellency. By this method, the additive is incorporated into the resin in conventional manner, i.e., either by dry or melt ployed as conventional oil and water repellents and as.

such can be applied to substrates in accordance with known methods.

The compounds of this invention are prepared by reacting a triazaalkane having the formula wherein R, and q have the meanings given for the compounds of this invention, with a diacid chloride having the formula i i 010R 01 wherein R has the afore-stated meaning, with the exception that R is not a dicarboxy phenyl diradical having the formula 110 o c g In order to prepare the compounds of this invention wherein R is this particular phenyl diradical, pyromellitic anhydride is used as the reactant in place of a diacid chloride, as is illustrated in Example 10.

The reaction is carried out in any solvent which is capable of dissolving the reactants and "which is inert with respect to the reactants and the product. Most customarily employed organic solvents, such as acetone, are suitable. The reaction can be carried out at temperatures ranging from room temperature up to 200 C", preferably from room temperature to l00 C. Lower temperatures can be used if desired.

When a diacid chloride is used as a reactant, it is desirable to add to the reaction mixture an organic base which forms an insoluble salt with the HCl which is liberated as a byproduct. Triethylamine is particularly suitable as such an organic base.

The diacid chloride reactants are well known'materials. The triaza reactants are readily prepared by reacting a lower alkyLester of an acid having the formula R,-.

COOH with an amine having -the formula NH,(CH,),

NH(CH,),h,, wherein R; andq have the meanings given for the compounds of this invention. Esters derived from acids having the formula R,COOH wherein the Y group of the R, component is F,C- are well known materials and can be made from the acids, which are generally. available commercially. Acids wherein Y has the formula can be prepared from a telomer halide having the formula R1 F (I) R) F OCF:CF:(CFCF2)w( i z)1 FcR,

1'1. wherein R and R, have the afore-stated meanings, w and x are integers indicating the respective degrees of telomerization, and E is bromine or iodine. These telomer halides and their method of preparation are described in US Pat. No. 3,514,487. The telomer halides are prepared by reacting telogens of the formula I Fen.

FCOCFICFIE FCRz with telomerizable unsaturated compounds, i.e., tetrafluoroethylene and ethylene, the reaction being initiated by heat or free radical catalyst. The telogens are prepared by reacting the corresponding perfluorinated ketone with an ionizable fluoride salt, e.g. CsF, to form the corresponding organic salt, and then reacting the organic salt with tetrafluoroethylene and either bromine or iodine. Preparation of the telogens is described in greater detail in US. Pat. No. 3,453,333.

Acids having the formula The acid can also be prepared (regardless of whether I is 0 or greater) by reacting the telomer halide with sulfur trioxide, followed by hydrolysis of the reaction product to obtain the acid. By this method, the acid contains one less carbon atom than the telomer halide from which it was prepared. Also, the acid thus formed can be converted to the corresponding telomer iodide for further telomerization by reaction with alkali-free silver oxide to form the silver salt, followed by reaction of the silver salt with powdered iodine to form the telomer iodide. By this method, acids having either an odd or even number of hydrocarbyl or fluorocarbyl groups can be prepared.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred compounds of this invention have the formula wherein R is a covalent bond, an alkyl diradical of one to eight carbon atoms, a phenyl diradical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula H000 COOH q is 2; and R, is a radical having the formula wherein s is an integer from 2 to t is an integer not greater than s from O to 4; and Y is selected from the group consisting of F C- and radicals having the formula wherein R and R are fluorine or perfluoroalkyl groups having from one to two carbon atoms. In especially preferred embodiments of this invention, R, and R are fluorine, s is 2 to 5, and t is 0 to 2.

The following examples further illustrate the invention. In each example the product was identified by elemental and infrared spectrum analyses.

EXAMPLE 1 To a flask containing 100 ml of acetone, 12.1 grams triethylamine and 82.7 grams of the compound there was added dropwise over a period of 27 minutes a solution of 10.2 grams isophthalyl chloride in 100 ml acetone. The reaction mixture was maintained at a temperature between 44 and 57 C. fortwo hours, allowed to stand overnight, heated at reflux (57 C.) for 30 minutes, chilled to 5 C. and then filtered toremove the by-product triethylamine hydrochloride. The filtrate was heated to remove the acetone. Water was 0 added to the residue, which on heating produced a milky slurry, which was filtered. The cake dissolved in ethanol on heating. A total of 68.7 grams of product, melting point l39-l40 C., were obtained by crystallization from ethanol. The .product was identified as having the chemical structure EXAMPLE 2 To a flask containing ml of acetone, 8.3 ml of triethylamine and 27 grams of l,7-bis(perfluoroctanoyl)-l ,4,7-tn'azaheptane, which has the formula there was added a solution of 3.05 grams of isophthalyl chloride in 50 ml of acetone. The reaction mixture was initially clear, but a precipitate began to form after a few seconds. The mixture was stirred at room temperature for 2 hours, heated to between 50 and 55 C. for 1 hour, cooled to room temperature and filtered. The cake was dissolved in warm ethanol. A total of 21.9 grams of product, melting point l84-185 C., were obtained by crystallization from ethanol. The product had the following chemical structure I i CF3(C F2)s( 1NH(CH2)2N(CH2)2NHC (C F2 0CF3 11:0 0 7 oFa on)tiiNmoa a qoamNai crotch EXAMPLE 3 To a flask Containing a solution of 26 grams of 1,7- bis(perfluorooctanoyl)-l,4,7-triazaheptane and 8.3 ml of triethylamine in 150 ml of acetone, there was added a solution of 6.65 grams of tetrachlorophthaloyl chloride in 50 ml of acetone. The reaction mixture was stirred at room temperature for 3.5 hours, heated to 50 C. for 2 hours, and filtered. The filter cake was heated with 100 ml ethanol, cooled, and filtered. A total of 11.9 grams of product, melting point 180 C., were recovered .by crystallization from ethanol. The product was identified as l,7-bis(perfluorooctanoy1)- l,4,7-triazaheptane tetrachlorophthalamide and had. a surface energy of 14.6 dynes/cm.

EXAMPLE 4 To a flask containing 8.3 ml of triethylamine, 27 grams of l,7-bis(perfluorooctanoyl)-1,4,7-triazaheptane and 150 ml of ethyl ether, there was added a solution of 1.3 ml of oxalyl chloride in 50 ml of ethyl ether over a period of 20 minutes. A gelatinous mass formed which was heated to reflux with water, which broke the gel. The mixture was heated at reflux for 30 minutes, then filtered. The filter cake was washed with hot water and then extracted with 500 ml of ethanol. Evaporation of the ethanol yielded 6.6 grams of a yellow-brown solid which was boiled in acetone, which dissolved the colored material, leaving a white, insoluble portion which was recovered by filtration. The white portion, melting point 185 C., was identified as having the structure EXAMPLE 5 The general :procedure of Example 2 was followed except 3.6 grams of sebacoyl chloride were substituted for tetraphthaloyl chloride. There was obtained 22 grams of 1,7-bis(perfluorooctanoyl)-l,4,7-triazaheptane sebacamide, melting point 163-165 C.

EXAMPLE 6 To a flask containing 27 grams l,7-bis(perfluorooctanoyl)-1,4,7-triazaheptane, 150 ml of acetone and 8 ml of triethylamine, there was added 2.3 grams of succinyl chloride over a period of 18 minutes. The reaction mixture was stirred at room temperature for 1 hour, then at 45-50 C. for 30 minutes. After cooling, the mixture was filtered. The filter cake was washed with acetone, .ethanol and hot water and was substantially insoluble in all three. The cake was then heated in a solution of 100 ml of water, 2 grams of sodium hydroxide and 75 ml of methanol. The mixture was filtered and the filter cake was washed with water and extracted with 100 ml each of hot acetone, methanol and glacial acetic acid. After evaporation, there was obtained 1 1.5 grams of product, melting point 192-l95 C., which was identified as l,7-bis(perfluorooctanoyl)- 1 ,4,7-triazaheptane succinamide.

EXAMPLE 7 To a flask containing 17.9'grams of l,7-bis(perfluorooctanoyl)-l,4,7-triazaheptane,. 8 m1 of triethylamine and 200 ml of anhydrous acetone, there was added 1.83 grams of adipyl chloride in 50 ml, of acetone. The reaction mixture. was stirred at room temperature for 3 hours, then filtered. The filter cake was then heated with ethanol and filtered. Upon drying the filter cake, there was obtained 15.2 grams of product, melting point l-l95 C., which was identified as l ,7-bis(perfluorooctanoyl l ,4,7-triazaheptane adipamide. The product had a surface energy of 11-13 dynes/cm.

A solution of 1 percent by weightof the product in EXAMPLE 8 By a method analogous to that of Example 1, 13.0 grams of l,7-bis(perfluoroisopropoxyhexanoyl)-l,4,7- triazaheptane were reacted with 1.25 grams of isophthalyl chloride to produce 7.7 grams of 1,7- bis( perfluoroisopropoxyhexanoyl )-l ,4,7-triazaheptane isophthalamide, melting point 172C.

EXAMPLE 9 To a flask containing a solution of 6.9 grams of the compound [(CF ),CFO(CF,),(Cl-lghCONl-KCHQ, Nl-1 in 50 ml of dyglyme, there was added 0.89 gram of isophthalyl chloride and 1.13 gram of triethylamine. The reaction mixture was gradually heated over a period of 4 hours to a temperature of 137 C. After cooling, the mixture was filtered to remove triethylamine hydrochloride. The filtrate was heated to remove the solvent and the residue was dissolved in methanol. The addition of water produced a milky precipitate which was recovered by filtration. After drying, there was obtained 2.35 grams of product which was identified as [(CF,),CFO(CF ),(CH, CONH(C1-1,),] NCOC H CON[(CH,),N1-1CO(Cl-1,), 2)2 a)2] 2 EXAMPLE 10 To a flask containing a solution of 15.1 grams of 1,7- bis(perfluoroisopropoxybutyryl l ,4,7-triazaheptane in ml of acetone, there was added a solution of 2.0 grams of pyromellitic anhydride in 50 ml of acetone. The reaction mixture was maintained at 40 C. for 2 hours and heated at reflux for 1 hour. The addition of water produced a gelatinous layer which was recovered by filtration. After drying, there was obtained 9.5 grams of product, melting point C. An additional 6.5 grams of product were recovered from the mother liquor. The product was identified as having the structure It is not possible to determine whether the two carboxyl groups are meta or para with respect to each other. Most likely, the reaction product is a mixture of the two isomers. Hence, when the symbol HOOC:COOH

wherein R is a covalent bond, an alkyl diradical of one to 12 carbon atoms, an alkylene diradical of two to 12 carbon atoms, a phenyl diradical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical; having the formula q is an integer from 1 to 6; and R, is a radical having the formula wherein s is an integer from 1 to 16, t is an integer not greater than s from to 8, with the sum of s plus t being from 1 to and Y is selected from the group consisting of F C and radicals having the formula wherein R, and R are fluorine or perfluoroalkyl groups having from one to nine carbon atoms, provided that not more than three of the R, and R groups are perfluoroalkyl groups.

2. The compound of claim 1 wherein R is an alkyl radical of one to eight carbon atoms, a phenyl radical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula q is 2; s is an integer from 2 to 10; t is an integer not greater than s from 0 to 4; and R, and R are fluorine or perfluoroalkyl groups having from one to two carbon atoms.

3. The compound according to claim 2 wherein R, is CF (CF )B6.

4. The compound of claim 2 wherein R, and R are fluorine.

5. The compound of claim 4 wherein s is 2 to 5 and t is 0 to 2.

6. The compound of claim 1 wherein R, has the formula wherein s is an integer from 1 to 16, t is an integer not greater than s from 0 to 8, with the sum of s plus t being from 1 to 20, and R, and R are fluorine or perfluoroalkyl groups each having from one to nine carbon atoms, provided that not more than three of the R, and R groups are perfluoroalkyl groups.

7. The compound of claim 6 wherein R is an alkyl diradical of one to 12 carbon atoms or an alkylene diradical of two to 12 carbon atoms.

8. The compound of claim 7 wherein R is an alkyl diradical of one to eight carbon atoms, s is an integer from 2 to 10, t is an integer not greater than s from 0 to 4, and R, and R are fluorine or perfluoroalkyl groups each having one or two carbon atoms, provided that not more than three of the R, and R groups are perfluoroalkyl groups.

9. The compound of claim 8 wherein R is an alkyl diradical of one to eight carbon atoms, s is an integer from 2 to 5, t is an integer not greater than s from O to 2, q is 2, and R, and R are fluorine.

10. The compound of claim 9 wherein R is an alkyl diradical of 4 carbon atoms, s is 3 and t is 0. 

2. The compound of claim 1 wherein R is an alkyl radical of one to eight carbon atoms, a phenyl radical having from zero to four chlorine substituents, or a dicarboxy phenyl diradical having the formula q is 2; s is an integer from 2 to 10; t is an integer not greater than s from 0 to 4; and R1 and R2 are fluorine or perfluoroalkyl groups haVing from one to two carbon atoms.
 3. The compound according to claim 2 wherein Rf is CF3(CF2)6-.
 4. The compound of claim 2 wherein R1 and R2 are fluorine.
 5. The compound of claim 4 wherein s is 2 to 5 and t is 0 to
 2. 6. The compound of claim 1 wherein Rf has the formula
 7. The compound of claim 6 wherein R is an alkyl diradical of one to 12 carbon atoms or an alkylene diradical of two to 12 carbon atoms.
 8. The compound of claim 7 wherein R is an alkyl diradical of one to eight carbon atoms, s is an integer from 2 to 10, t is an integer not greater than s from 0 to 4, and R1 and R2 are fluorine or perfluoroalkyl groups each having one or two carbon atoms, provided that not more than three of the R1 and R2 groups are perfluoroalkyl groups.
 9. The compound of claim 8 wherein R is an alkyl diradical of one to eight carbon atoms, s is an integer from 2 to 5, t is an integer not greater than s from 0 to 2, q is 2, and R1 and R2 are fluorine.
 10. The compound of claim 9 wherein R is an alkyl diradical of 4 carbon atoms, s is 3 and t is
 0. 